//Tower/share /home/username/local/mountpoint cifs file_mode=0777,dir_mode=0777,_netdev,username=valid,password=secure,uid=1000,gid=1000 0 0
Works for me, obviously the local mountpoint has to exist before mounting, and the user and password must have write on unraid. Don't remember the why's and whatevers of the options at the moment, and other options may be needed depending on circumstances. I format the spacing the way I do to keep all my monospaced entries vertically aligned in my fstab